HIGH
The XSLT functionality in WebKit in Apple Safari before 4.0 does not properly implement the document function, which allows remote attackers to read (1) arbitrary local files and (2) files from different security zones via unspecified vectors.
http://lists.apple.com/archives/security-announce/2009/jun/msg00002.html
http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html
http://secunia.com/advisories/35379
http://secunia.com/advisories/43068
http://support.apple.com/kb/HT3613
http://www.securityfocus.com/bid/35260
http://www.ubuntu.com/usn/USN-857-1
http://www.vupen.com/english/advisories/2009/1522